.popup {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: 0.6s;
}
.popup.is-show {
  opacity: 1;
  visibility: visible;
}
.popup-inner {
  position: absolute;
  left: 50%;
  top: 5%;
  transform: translate(-50%,0%);
  width: 80%;
  max-width:700px;
  min-width:600px;
  padding: 0px;
  z-index: 2;
}
.popup-inner img {
  width: 100%;
}
.close-btn {
  position: absolute;
  right: 0;
  top: 10;
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  cursor: pointer;
}
.close-btn i {
  font-size: 20px;
  color: #333;
}
.black-background {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,.8);
  z-index: 1;
  cursor: pointer;
}